Description

4,4'-[Carbonylbis[Imino(2-Methyl-5-Methoxy-4,1-Phenylene)Azo]]Bisbenzenesulfonic Acid is a specialized azo dye intermediate characterized by its sulfonic acid groups, which impart excellent water solubility. This compound is valued for its role in synthesizing high-performance, colorfast dyes and pigments for demanding industrial applications. It is primarily sought by manufacturers in the textile, ink, and specialty chemical sectors who require precise and reliable intermediates for their production processes.

Application

• Textile Dye Synthesis: A key intermediate for producing reactive, acid, and direct dyes for coloring natural and synthetic fibers like cotton, wool, and nylon.
• Inkjet and Printing Ink Formulation: Used in the manufacture of high-quality inks where color intensity, stability, and solubility are critical.
• Paper Coloring: Employed in the production of dyes for specialty papers and packaging materials.
• Leather Dyeing: Serves as a precursor for dyes used in the leather tanning and finishing industry.
• Biological Staining: Potential use as an intermediate for histochemical stains and indicators in laboratory settings.
• Functional Material Research: Investigated for applications in advanced materials, including optical sensors and light-harvesting systems.

Basic Information

Product Name	4,4'-[Carbonylbis[Imino(2-Methyl-5-Methoxy-4,1-Phenylene)Azo]]Bisbenzenesulfonic Acid
CAS No.	72102-82-0
Molecular Formula	C30H26N6O9S2
Molecular Weight	678.69 g/mol
Synonyms	Acid Yellow 219 (C.I. 13919); C.I. Acid Yellow 219; 4,4'-[Carbonylbis[imino(2-methyl-5-methoxy-4,1-phenylene)azo]]di(benzenesulfonic acid); Benzenesulfonic acid, 4,4'-[carbonylbis[imino(2-methyl-5-methoxy-4,1-phenylene)azo]]bis-; 72102-82-0; C.I. 13919; Acid Yellow 219; Azo dye intermediate YA
EINECS	Contact for details

Quality Control

Our production of 4,4'-[Carbonylbis[Imino(2-Methyl-5-Methoxy-4,1-Phenylene)Azo]]Bisbenzenesulfonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques like HPLC and spectrophotometry to verify identity, strength, and impurity profiles. Certificates of Analysis (COA) documenting all critical parameters are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.